A caravan fridge relay and rebuilding a fuse boxÖ.
I was one of those lucky guys working on a beautiful Saturday with a beautiful
car and getting to grips with the Scorpios electrical systems. The goal was to
provide an extra +12v line to feed the refrigerator in the caravan, but only
live when the engine is running so save draining the battery.
solution is actually quite simple: a relay near the battery that switches +12v
directly from the battery positive terminal (through a fuse of course). The
relay is connected to Earth and to an unused connection in the fuse box which
carries 12 volts only when the engine is running. This connection is shown
by the red arrow in the picture, near relay R23 which is not actually fitted to
I left the Scorpio half way through the job to go shopping with
my wife on this beautiful Saturday. However the sky turned dark and we it rained
cats and dogs, and I never even thought of fusebox or it's battery cover!
I came back from shopping and YES the car was open, the covers were not
fitted and the lights were on and I could not put them off and everything else
happened too! Then I realised the water in the fuse box was the main cause for
all of this weird behavior.
As it was Saturday afternoon there was nothing else to do than to disconnect
the fuse box, dry it, clean it and reinstall it again. Because drying with a
hairdryer just did not work (once the box is wet the damage has been done) I had
to disassemble the fuse box. Do not fear! It is really not complicated; you just
need some time and patience and a few photos and notes as you go along. In all
it took me 5 hours and since then I have not had a problem. Here are a few tips: